sarah raffan - david scott

I am searching for relatives of Sarah Raffan born about 1832 who married David Scott a horse dealer in Edinburgh.They went to Australia in 1854 and had daughter Catherine, Helen and Sarah A. and returned to UK ? and had Euphemie and David(my great grandfather) and maybe Alexander and Cara ( born 1869). Hopefully someone out there is related to this Raffan.I can't find anything on her, birth, marriage record or death record. My email is w.k.storms@sympatico.ca I live in Stirling, Ontario Canada.